On a tangent, the NSA put out a paper long long ago on X Windows security. (I don't think it was this on but it might have been: "Securing The X Window System With SELinux" [1]) Do you happen to know the one?

I'd also like to thank you for turning me on to NeWS et. al. ages ago in another forum. Blew my mind because at the time I only really knew about MS Windows and X. Cheers!

[1] https://www.nsa.gov/resources/everyone/digital-media-center/...

https://en.wikipedia.org/wiki/NeWS